Add add PIE support for m88k (requires gcc4 toolchain)

Convert __cerror to hidden visibility.

from miod@

3 files changed, 44 insertions, 10 deletions

diff --git a/lib/csu/m88k/md_init.h b/lib/csu/m88k/md_init.h
index f55018a474d..e5ec20705aa 100644
--- a/lib/csu/m88k/md_init.h
+++ b/lib/csu/m88k/md_init.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: md_init.h,v 1.5 2016/03/24 05:27:19 guenther Exp $	*/
+/*	$OpenBSD: md_init.h,v 1.6 2018/06/16 16:06:03 guenther Exp $	*/
 
 /*
  * Copyright (c) 2012 Miodrag Vallat.
@@ -46,12 +46,8 @@
  *
  * Our start code starts with two nops because execution may skip up to
  * two instructions; see setregs() in the kernel for details.
- *
- * The definitions of environ and __progname prevent the creation
- * of COPY relocations for WEAK symbols.
  */
 #define	MD_CRT0_START					\
-	char **environ, *__progname;			\
 	__asm(						\
 	"	.text					\n" \
 	"	.align 3				\n" \
@@ -68,3 +64,39 @@
 	"	 addu	%r4, %r4, 4			\n" \
 	"	 /* envp = argv + argc + 1 */		\n" \
 	"	.previous");
+
+#define	MD_RCRT0_START					\
+	__asm(						\
+	"	.text					\n" \
+	"	.align 3				\n" \
+	"	.globl __start				\n" \
+	"	.globl _start				\n" \
+	"__start:					\n" \
+	"_start:					\n" \
+	"	or	%r0, %r0, %r0			\n" \
+	"	or	%r0, %r0, %r0			\n" \
+	\
+	"	or	%r2, %r31, 0			\n" \
+	"	subu	%r31, %r31, 4*16		\n" \
+	"	or	%r3, %r31, 0			\n" \
+	"	bsr	1f				\n" \
+	"	bsr	_DYNAMIC#plt			\n" \
+	"1:	ld	%r6, %r1, 0			\n" \
+	"	mak	%r5, %r6, 26<2>			\n" \
+	"	addu	%r4, %r5, %r1			\n" \
+	"	bsr	_dl_boot_bind#plt		\n" \
+	"	addu	%r31, %r31, 4*16		\n" \
+	\
+	"	ld	%r2, %r31, 0	/* argc */	\n" \
+	"	addu	%r3, %r31, 4	/* argv */	\n" \
+	"	lda	%r4, %r3[%r2]			\n" \
+	"	or	%r5, %r0, %r0	/* cleanup */	\n" \
+	"	br.n	___start			\n" \
+	"	 addu	%r4, %r4, 4			\n" \
+	"	 /* envp = argv + argc + 1 */		\n" \
+	\
+	"_dl_exit:					\n" \
+	"	or	%r13, %r0, 1			\n" \
+	"	tb0	0, %r0, 450			\n" \
+	"	or	%r0, %r0, %r0			\n" \
+	"	.previous");
diff --git a/lib/libc/arch/m88k/SYS.h b/lib/libc/arch/m88k/SYS.h
index 636b5e7ea82..feb08d91253 100644
--- a/lib/libc/arch/m88k/SYS.h
+++ b/lib/libc/arch/m88k/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.24 2016/09/22 18:19:59 guenther Exp $*/
+/*	$OpenBSD: SYS.h,v 1.25 2018/06/16 16:06:03 guenther Exp $*/
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -73,8 +73,10 @@
 	ld	%r11, %r25, __CONCAT(sym,#got_rel);			\
 	st	reg,  %r11, %r0
 #endif
-#endif
+#define	CERROR	__cerror#plt
+#else	/* __PIC__ */
 #define	CERROR	__cerror
+#endif	/* __PIC__ */
 
 #define	__DO_SYSCALL(x)							\
 	or %r13, %r0, __SYSCALLNAME(SYS_,x);				\
@@ -127,5 +129,3 @@
 #define	SYSCALL_END(x)		SYSCALL_END_HIDDEN(x); END(x)
 
 #define	ASMSTR		.asciz
-
-	.globl	__cerror
diff --git a/lib/libc/arch/m88k/sys/cerror.S b/lib/libc/arch/m88k/sys/cerror.S
index 20b2d43581a..7297885dc0e 100644
--- a/lib/libc/arch/m88k/sys/cerror.S
+++ b/lib/libc/arch/m88k/sys/cerror.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cerror.S,v 1.14 2016/09/22 18:19:59 guenther Exp $	*/
+/*	$OpenBSD: cerror.S,v 1.15 2018/06/16 16:06:03 guenther Exp $	*/
 
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -51,6 +51,8 @@ ASENTRY(__cerror)
 	 or	%r2, %r0, %r3
 END(__cerror)
 
+	.hidden	__cerror
+
 #if 0
 /* ahh, if only */
 ASENTRY(__errno)